ideally with encryption you would search for something to download, then send a public key to the source and he would encrypt it with that key, and it can only be decrypted by your private key. he could also sign it with his private key, etc. Just that its extra work, and has to be done for every download, but compared to bandwidth encryption cycles are cheap, I mean AES Rijandael (sp), one of the best codecs out there, is pretty fast.